Geodetic Antarctic Project (GAP)
(finished 2000)
During the XXIII Meeting of the Scientific Committee on Antarctic Research (SCAR) held in Rome in 1994 the Working Group on Geodesy and Geographic Information (WG-GGI) established a working program for the next years. It was decided that SCAR Epoch GPS Campaigns should be organized as a continuation of former epoch campaigns. The responsibility for the coordination of these campaigns was given to Germany.
The objectives of the GPS Epoch Campaigns, as a part of the working group project GIANT (Geodetic Infrasructure for Antarctica) can be described as follows:
- Linking of Antarctica with the IERS Terrestrial Reference Frame (ITRF) with highest accuracy.
- Measurement of the relative motion rates and directions of the Antarctic Plate with respect to the adjoining plates and microplates.
- Determination of the relative motion of crustal blocks within the Antarctic Plate.
- Unification of the vertical datum, determination of the height of the mean sea level at tide gauge stations.
- Determination of the vertical motion of the Antarctic lithosphere due to changes of the ice and ocean loading.
Research Vessel "Akademik Boris Petrov"
"GAP" (Geodetic Antarctic Project) is the name of a compound project within the SCAR Epoch Campaigns, carried out by seven German institutions: the Universities of Braunschweig (IGP), Dresden (IPG), Hannover (IfE), Karlsruhe (GIK), München (IAAG), the Federal Agency for Cartography and Geodesy (BKG) and the AWI.
In addition the Russian Vernadsky Institute (GEOCHI) participated in the GAP Campaigns in co-operation with the German institutes. The Russian research vessel "Akademik Boris Petrov" had been made available both for logistics and in order to allocate marine-geophysical data in the Southern Pacific and the Southern Atlantic seas.
Information available on this site:
- Map of the stations used in the SCAR98/GAP98 GPS epoch campaign.
- Map of the ship's route during the SCAR98/GAP98 GPS epoch campaign.
- List of final coordinates and velocities (AWI solution).
- Vector plot of velocities and comparison of different solutions.
- Earthquake - Evidence of a tectonic plate displacement near Dumont D'Urville, discovered in GPS and tide gauge time series.
Stations used in the SCAR98/GAP98 GPS epoch campaign
GAP and IGS stations used in the GAP campaign analysis,
along with the plate tectonics in southern hemisphere.
Routes during the SCAR98/GAP98 GPS epoch campaign
Trackplot of the RV Akademik Boris Petrov during GAP98
Velocities and comparison of different solutions
Velocity map and comparison among ITRF96, permanent station analysis, GAP final results, and AWI GAP campaign analysis.
Earthquake: Evidence of a tectonic plate displacement near Dumont D'Urville, discovered in GPS and tide gauge time series
GPS daily solution time series for station DUM1 in north, east, and upward components, along with the seismicity occurred since March 25, 1998 in the region. The seismic events occurred along the dominant west-east rupture trend are marked in red, and those along the secondary north-south rupture trend marked in blue.
Earthquake at Dumont D'Urville: Sea-level variations on March 24 and 25, 1998.
Earthquake at Dumont D'Urville: GPS daily solution time series for station DUM1 in north, east, and upward components, along with the seismicity occurred since March 25, 1998 in the region (top). The seismic events occurred along the dominant west-east rupture trend are marked in red, and those along the secondary north-south rupture trend marked in blue.
References
X. Chen, M. Forberg, H. W. Schenke, M. Pohl, T. Schöne, C. Le Provost:
Auswertung von Daten der SCAR GPS-Kampagnen und Permanentstationen in der Antarktis und Umgebung. In: Dietrich et al. (2000): Deutsche Beiträge zu GPS-Kampagnen des Scientific Committee on Antarctic Research (SCAR) 1995-1998. DGK, Reihe B, Heft Nr. 310, München 2000
T. Schöne, G. Udintsev, H. W. Schenke, M. Forberg, M. Pohl:
Verlauf der Forschungsfahrt der "Akademik Boris Petrov" während GAP98. In: Dietrich et al. (2000): Deutsche Beiträge zu GPS-Kampagnen des Scientific Committee on Antarctic Research (SCAR) 1995-1998. DGK, Reihe B, Heft Nr. 310, München 2000